Adapter needle



Feb. 4, 1930.

. H. K. MULFORD ADAPTER NEEDLE Filed May 12, 1927 ATTORNEYS.

' coming clogged in use,

' To the above endsmy lnvention' consists of an adapter comprismgabo'dyportlon, an'up-,

. Patented Feb.1.,4,"19l30 HENRY- K. MULFORD, ,oErEnhnmrI-rm,PENNsxLvANIA, AssIeNoE- T NATIONAL; I

. mwe 00,, 0E PHILADELPHIA, v ENNsYLv NIA, A CORPORATION 0E PENNSYLVANIAt V g DAET E NEEDLE My inventionrelates to a new and useful a as Well asfor use on collapsible tubes. a

My invention more particularly relates to a novel needle adapter forsyringes and collapsible tubes of the character, whereby'neeldles, ofdifferent sizes may. be ,employed interchangeably andw-hereby a'broken,damaged, clogged or contaminated needle can be removed and replaced by anew one instan taneously' so that notime is lost in cases of emergency.7

One object of my invention is to provide'a novel adapter which may beoperativelycoln nected with or inserted into the interior of a l syringeor collapsible tube near-the ejection I end thereof, instantaneouslyand-in aliquid tight manner, and to which, in turn, any size mn'eedlemaybe coupled or, secured also instantaneously and without anyelaborate'fastenling or securing devices. I

A further objectof my invention is to facilitate the introduction oftheinjection fluid 'from the syringe or collapsible tube through thehollow needle to the point of application andto eliminate the liabilityofthe needle bewardly or inwardly extendingstemfm piercing thejrubber'orother closure on the ejeczle'of collapsible tube, said adapterbeingfrictionally or -threadedly retained in position, and aperidantexterision adapted tofit 7 into a correspondingseat in the upperend of a needle, there being' a passage extending through said adapterand forming a ,commu nication from the interiorof the syringe,'to saidhollow needle, the passage in said adapt er being much larger thanthepassage in said needle.

er of this general character having 'anupejection end of the syringe. I

- tion end of a syringe or forenteringthe-nozs My invention furtherconsists ofan adapt-"i Application fiiea May 12, 1927 'ser ai b.190,635.

'For the purpose of illustrating invention, I have shown in theaccompanying drawings,-forms-thereof which are at 'pres' I ent preferredby me since they will give in practice, satisfactoryandreliable'results, al

described.

Inithe accompanying drawings, inwhich -like.'reference charactersindicate like parts,

Fig. '1 represents alongitudinal sectional though'itis to .be understoodthat the'various 'instrumentalities of which my invention consi'sts canbe variously arranged and organized and that my invention is not limitedto the precisejarrangement] and organization" of these'instrumentalities as herein shown and vi'ewof an adapter needle and itsadjuncts and a hypodermic syringe to which the same is'applicable,certain parts being shown in I elevation.

Fig. 2'represents on an enlarged scale an adapter needle and itsadjuncts in detached position.

Fig. 3 represents a longitudinal section view of another embodiment.ofmy inventhejoutlet end of the barrel or cylinder lot thehypodermicsyringewith a narrowedor a tightly engaged by the rubber cap 5having a I rearwardly extending fiange6, which encloses the bead 4andtightly and snugly engages the tion, Fig. 4 represents a detail View andFigs '75) 5 and 6 represent a modifiedconstruction. l. y

In carrying out my invention I construct" wall 3. H The adapter needle 7is composed of conical, pendant extension 11' and the oppositelyextending needle portion 12,there' bethe members 8 and 9, the member 8compris-' 1 ting the head or-body portion 10, having a ing apassage 13through said needle portion, 7 body and conical extension 11 The member9 is provided with an upper he'adlfZ", having a conicalseat 13 therein,whose contour conforms with the ,outer contour of the conicalpendantportion 11, so that the latter is frictionallyand tightly heldwithin the seat 13 when the members" are assembled. ll'desjig' nate'sthe needle, which is integral with the head 12 and providedwith apassage 15 -there-1 1,00 i I alreadydescribed, but differs from. theconstruction seen in Figs. 1 and 2 .by the addition of the annularupwardly extending flange 17 which is adapted tightly and frictionallytoengage the rubber cap 5 already described as will be understood fromFig. 3; The bypodermic syringe contains the serum or solution 21 and isprovided with a piston or plunger 1801" the usual construction, which isactuated by the piston rod 19 which passes through the closure 20, theseparts being of the usual construction. The needle and adapter members 9and 8 are made of steel or the like and the cap 5 of rubber or similarmaterial.

By the provision of a substantial and rigid adapter member having theupper pointed stem 12, the'piercing of the rubber cap or closure 5 atthe ejection end of the syringe is easily and quickly effected and therisk of breakage of the needle is eliminated. The

relatively large passage 13 in the stem 12 facilitates the passage orflow of thefiuid 12 from the cylinder into the relatively restrictedpassage 15 in the needle 14, and this is especially true when a ratherdense or viscous fluid, such as serum or vaccine is being inj ected,since capillary attraction as well as mechanical friction wouldotherwise tend to retard the free flow of the fluid to its destination.Especial attention is called to the employment of the relatively largepassage 13 in the member 8, since by this construction an elonated'relatively large auxiliary reservoir for the fluid or serum isprovided, which in practice enables my novel adapter needle to bereadily and instantaneously operative under all conditions of use, whichis not always the case when the passages 13 and 15 are of the samerestricted area in cross section. It is desirable in emergency cases,where sometimes a patients life is dependent upon the needle functionininstantaneously and positively under all conditions that the needle beinstantly operative orcapable of instantly performing its desiredfunction,-and I have found from practical use of my device that it isessential to have the elongated passage orauxiliary reservoir 13relatively large as compared to the restricted passage 15 particularlywhen a. rather dense or viscous fluid, as

above explained, is to be handled or injected.

My novel constructionof the adapter member 8 serves to permit of theemployment of any size needle, since the extension 11 thereof as well asthe coacting seat 13 can be made of needle, all ofwhich can be done in avery little time and with a minimum effort.

It is also. easyfor the operator to use any.

special. standardLuertype slip or screw thread needle, if he desires touse a special size or shape needle for intravenous, intramuscular,subcutaneous and intracutaneous injections. V

It is within the scope of my invention to provide an adapter needleparticularly suited for use on collapsible tubes and the like,comprising a body portion having a stem projecting therefrom, aninternally threaded "annular flange surrounding said stem and adapted toengage the threaded outlet of a conventional collapsible tube, and apendant threaded extension adapted to engage a-correspondingly threadedcup shaped seat on one end of'a needle, said stem, extension, and needlehaving aligning passages upwardly extending, annular, internally.

threaded flange 28 and the pendant externally threaded extension 27which is engaged by the internally threaded cup-shaped ,head 29 on-oneend of a needle 14, the passage 30 in said adapter 25 being in alignmentwith and Y much larger than the passage 15 in said needle. 31 designatesan upwardly projecting stem adapted to project into or enter the nozzle24 of the tube 22, while 32 designates a gasket ofrubber or othermaterial disposed around the base ofsaid stem 31 to prevent any leakageof the contents of said tube, said gasket being compressed between thenozzle 24 and-the seat in the adapter 25, when the parts are assembledas seen in Fig. 5.

It will also be apparent that I have devised a novel and useful adapterneedle construction which is inexpensive to produce and easy toassemblesince the same comprises but two parts and is adapted for avariety of uses. a

It will now be apparent that I have devised a novel and usefulconstruction of adapter needle which embodies the features of advant geenumerated as desirable in the statement of the invention and the abovedescription and while I have in the present instance shown and describedthe preferred embodiment thereof which beeni found in practice to givesatisfactory'and reliable result s, ,it is to beunderstood that the sameis susceptibleof modification in various particulars withoutdeparting-from the spirit or scope of the invention or sacrificing any fits advantages. I

1. An adapter needle for a hypodermic syringe, comprising a body portionhaving a pointed'isternadapted to be retained within the syringecylinder, an annular flange sur-. rounding said stem'and adaptedfrictionally to engage the closure on the ejection end of,

said cylinder, and an oppositelydisposedu V adapter being relativelymuch larger-than conical pendant extension, and a. needle hav- 7 'ing aconical seat on one endthereof adapted to receive said extension, saidbody and needle portions having aligning passages of It "body portionbeing of greater diameter than i diflerent diameters thereincommunicating with said cylinder, the passage through said the passagethrough saidneedle.

'2. .In a device of the Character stated,

syringe body having acontracted ,neckand exit mouth the latter beingprovided with a terminal. annular outwardly flaring bead,

V, v I

. v extending aroundthe neckof said exit mouth,

a sage through said'stem andextension, and a a resilient closureengaging saidf bead and a cup shaped member having an outer an nularflange and an upwardly projecting,

reception of said tapering extension, the

diameter of the passage in the adapter being relatively 'much' largerthan the passage through said needle, whereby the tendency to clog theadapter is'reduced and cleaning in case of clogging is facilitated. a 5The combination of a serum and vaccine syringe, having a rubber closurefor'the discharge end thereof, anadapter therefor, comprising a bodyportionhaving a smooth, hol low,l p'ointed needle adapted to pierce saidclosure, said adapter being held in place in rubber. closure, saidadapter having an'opposltelydispos'ed tapering extension and a needlehaving a 'conical seat to receive said said syringe solely byjfrictionwith said;

extension, the diameter of the passage insaid the passage through saidneedle, whereby the tendency to clog is'reduced and cleaning in case ofcloggingis facilitated. J v

HENRY K. MULFORD.

needle member having a conical seat and pro-- vided witha passagethereth'roughof a lesser diameter than saidfirst mentioned passage,-

said annular flange frictionally engaging said,

resilient closurearound said bead. 3

, v 3. An'jadapter for serum and vaccine syrlnges' ofthe type havinga'rubber closure,

' comprising a body p ortionzhaving a smooth' hollow pointed needleadapted to pierce ltheff 1 closure, said adapter being held in placeinthe syringesolelyby-friction-with saidirub 1 her closure, said adapterhaving anoppositely I 1 disposed tapering extension for the attach I inthe adapterv being relativelymuch' larger ment of a needle, the diameteror the passage than the passagethroughthe gneedles to be used with thesyringe, whereby the tendency g 4:. In a device of the'character 1 toclog the adapter is reduced and cleaning 5,55

stated, an i adapter for serum and vaccine syringes of needlehaving aconical-seat adapted for the s the type having a rubber closure,comprising a "body portion having, a smooth, hollow,

pointedneedle adapted to'pierce said-closure} v V said adapter beingheldinplace in the'syrin'ge solely by friction with said rubber closure,

tapering e'xtension, in combination witha .said adapter having anoppositelyjdisposedv v a

